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| Name | No | Yard No | Builder | Laid down | Launched | Comp | Fate |
|---|---|---|---|---|---|---|---|
| Havmanden | H2, 1913- 3 | Whitehead, Fiume, Austria-Hungary | 23.12.1911 | 8.1912 | stricken 4.1928 | ||
| Havfruen | H1, 1913- 2 | Orlogsværftets, København | 31.8.1912 | 3.1913 | stricken 5.1932 | ||
| Thetis | T1, 1913- 4 | Whitehead, Fiume, Austria-Hungary | 19.6.1912 | 11.1912 | stricken 4.1928 | ||
| 2den April (ex-Triton) | 5 | Whitehead, Fiume, Austria-Hungary | 31.3.1913 | 9.1913 | stricken 1.1929 | ||
| Najaden | 6 | Orlogsværftets, København | 9.7.1913 | 12.1913 | stricken 9.1931 | ||
| Nymfen | 7 | Orlogsværftets, København | 10.2.1914 | 7.1914 | stricken 3.1932 |
| Displacement standard, t | |
|---|---|
| Displacement normal, t | 164 / 204 |
| Length, m | 38.8 |
| Breadth, m | 3.60 |
| Draught, m | 2.30 |
| No of shafts | 1 |
| Machinery | 1 6-cyl 2-stroke Fiat or MAN diesel / 2 electric motors |
| Power, h. p. | Havmanden, Thetis, 2den April: 430 / 270 Havfruen, Najaden, Nymfen: 450 / 275 |
| Max speed, kts | 13 / 10 |
| Fuel, t | diesel oil |
| Endurance, nm(kts) | 1400 (10) / 23 (8) |
| Armament | 2 - 450 TT (bow, 2) |
| Complement | 10 |
| Diving depth operational, m |
Design was developed by Whitehead. Submarines have appeared successful, and later under their drawings similar boats for Austrian-Hungarian Navy were built.
1917, all: + 1 x 1 - 8.80
No significant events.

